M spec mailer - Expandable cardboard envelope 350x300x75mm - pack of 25

M spec mailers are expandable corrugated mailers which pop out into boxes, providing a versatile carrier for goods of all kinds. These gusseted envelopes can carry items when flat in mailer form or when they have been made into a box, providing a versatile and adaptable packaging method for businesses. These mailers are far more cost-effective when compared to boxes, and take up less space on delivery vehicles.